cxvah.netkj.hhs.gov/A has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (5)
./DNSKEY (alg 8, id 20038): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2001:500:2f::f, UDP_-_EDNS0_4096_D_KN)
./DNSKEY (alg 8, id 20326): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2001:500:2f::f, UDP_-_EDNS0_4096_D_KN)
./DNSKEY: The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2001:500:2f::f, UDP_-_EDNS0_512_D_KN)
gov/DS (alg 13, id 2536): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2001:500:2f::f, UDP_-_EDNS0_4096_D_KN)
gov/DS (alg 13, id 2536): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2001:500:2f::f, UDP_-_EDNS0_4096_D_KN)